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