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