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