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