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