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