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