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