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