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