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