One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,9)(4,12)(5,11)(6,7)(8,15)(10,14)(13,16)(17,18,22,25)(19,23,26,30)(20,21,24,29)(27,28,31,32)(33,34)(35,39)(36,42)(37,45)(38,41)(40,46)(43,48)(44,47)(1,3,6,11)(2,5,7,9)(4,10,15,13)(8,14,12,16)(17,19)(18,23)(20,27)(21,28)(22,26)(24,31)(25,30)(29,32)(33,35,38,36)(34,39,41,42)(37,43,46,44)(40,47,45,48)(2,7)(5,9)(8,12)(14,16)(19,26)(23,30)(27,31)(28,32)(33,36,38,35)(34,39,41,42)(37,44,46,43)(40,47,45,48)(1,4)(2,8)(3,10)(5,14)(6,15)(7,12)(9,16)(11,13)(17,20)(18,21)(19,27)(22,24)(23,28)(25,29)(26,31)(30,32) involution — undirected(1,3)(2,9)(4,13)(5,7)(6,11)(8,14)(10,15)(12,16)(17,21)(18,24)(19,28)(20,25)(22,29)(23,31)(26,32)(27,30)(33,34)(35,42)(36,39)(37,40)(38,41)(43,48)(44,47)(45,46) involution — undirected(1,5,6,9)(2,3,7,11)(4,14,15,16)(8,10,12,13)(17,19)(18,23)(20,27)(21,28)(22,26)(24,31)(25,30)(29,32)(33,37)(34,40)(35,43)(36,44)(38,46)(39,47)(41,45)(42,48)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.