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