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