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