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)(20,32,21,26)(22,36,37,27)(25,35,43,34)(29,39,33,48)(30,45,47,40)(38,46,42,44)(2,6)(4,7)(9,10)(11,15)(12,14)(13,16)(17,19)(18,24)(20,33)(21,29)(22,30)(23,31)(25,42)(26,39)(27,40)(28,41)(32,48)(34,46)(35,44)(36,45)(37,47)(38,43) involution — undirected(1,3,5,8)(2,7,6,4)(9,11)(10,13)(12,16)(14,15)(17,20)(18,25)(19,29)(21,23)(22,35)(24,38)(26,27)(28,43)(30,46)(31,33)(32,36)(34,37)(39,45)(40,48)(41,42)(44,47)(2,6)(3,8)(11,16)(13,15)(17,21,23,20)(18,26,28,32)(19,29,31,33)(22,35,37,34)(24,39,41,48)(25,36,43,27)(30,44,47,46)(38,40,42,45)(1,4,5,7)(2,8,6,3)(10,14)(13,15)(20,21)(25,43)(26,32)(29,33)(34,35)(38,42)(39,48)(44,46)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.