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