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)(18,22)(19,25)(20,28)(24,30)(26,27)(29,32)(1,3)(2,6)(4,10)(5,9)(7,13)(8,12)(11,15)(14,16)(17,18,20,22,21,24,28,30)(19,23,26,29,27,31,25,32)(3,9)(6,12)(10,15)(13,16)(17,19)(18,23)(20,26)(21,27)(22,29)(24,31)(25,28)(30,32) involution — undirected(1,4)(2,7)(3,10)(5,11)(6,13)(8,14)(9,15)(12,16)(18,24)(22,30)(23,31)(29,32) involution — undirected(4,11)(7,14)(10,15)(13,16)(18,24)(22,30)(23,31)(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.