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