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