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