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