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