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