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