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