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