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