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