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