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