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