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