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