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