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