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