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