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