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