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