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