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