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