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