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