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