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