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