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