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