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