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