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)(11,15)(12,14)(13,16)(17,18)(19,24)(20,25)(21,26)(22,27)(23,28)(29,36)(30,38)(31,39)(32,40)(33,42)(34,41)(35,37)(43,46)(44,48)(45,47) involution — undirected(1,3,5,4)(2,6,7,8)(9,11,12,16)(10,13,14,15)(17,19,23,31)(18,24,28,39)(20,29,33,43)(21,30,22,35)(25,36,42,46)(26,38,27,37)(32,44,34,45)(40,48,41,47)(10,14)(11,16)(17,20)(18,25)(19,29)(21,34)(22,32)(23,33)(24,36)(26,41)(27,40)(28,42)(30,45)(31,43)(35,44)(37,48)(38,47)(39,46) involution — undirected(1,4,5,3)(2,6,7,8)(10,14)(13,15)(17,21)(18,26)(20,32)(22,23)(25,40)(27,28)(29,43)(30,35)(33,34)(36,46)(37,38)(41,42)(2,7)(6,8)(10,14)(13,15)(17,21,23,22)(18,27,28,26)(19,30,31,35)(20,32,33,34)(24,37,39,38)(25,41,42,40)(29,44,43,45)(36,47,46,48)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.