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