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