One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,11)(5,7)(8,12)(9,15)(10,13)(14,16)(18,23)(19,26)(21,29)(28,31)(33,34)(35,41)(36,40)(37,39)(38,42)(43,48)(44,47)(45,46) involution — undirected(1,3,5,10)(2,6,7,13)(4,9,12,16)(8,14,11,15)(17,18,22,23)(19,20,26,24)(21,25,29,30)(27,28,32,31)(33,35,38,37)(34,39,42,41)(36,43,44,45)(40,46,47,48)(2,7)(6,13)(8,11)(14,15)(17,19,22,26)(18,24,23,20)(21,27,29,32)(25,31,30,28)(33,34,38,42)(35,39,37,41)(36,40,44,47)(43,46,45,48)(1,2)(3,6)(4,8)(5,7)(9,14)(10,13)(11,12)(15,16)(17,19)(18,20)(21,27)(22,26)(23,24)(25,28)(29,32)(30,31)(33,34)(35,39)(36,40)(37,41)(38,42)(43,46)(44,47)(45,48) involution — undirected(1,3)(2,6)(4,9)(5,10)(7,13)(8,14)(11,15)(12,16)(17,20)(18,19)(21,28)(22,24)(23,26)(25,27)(29,31)(30,32)(33,36)(34,40)(35,43)(37,45)(38,44)(39,46)(41,48)(42,47) involution — undirected(1,4)(2,8)(3,9)(5,12)(6,14)(7,11)(10,16)(13,15)(17,21,22,29)(18,25,23,30)(19,27,26,32)(20,28,24,31)(33,37,38,35)(34,41,42,39)(36,43,44,45)(40,46,47,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.