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