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