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