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