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