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