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