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