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