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