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