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