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