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