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