One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,9,7,3,5,11)(4,10,13,16,14,8,15,12)(17,18,23,27)(19,28,24,30)(20,25,21,29)(22,31,32,26)(1,3,7,2)(4,12,14,16)(5,9,6,11)(8,13,10,15)(17,19,23,24)(18,21,27,20)(22,29,32,25)(26,30,31,28)(17,20)(18,24)(19,27)(21,23)(22,30)(25,31)(26,29)(28,32) involution — undirected(1,4)(2,8)(3,10)(5,15)(6,13)(7,14)(9,12)(11,16)(17,21)(18,25)(19,26)(20,23)(22,30)(24,31)(27,29)(28,32) 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.