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