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