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