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