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