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