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