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