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