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