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