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