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