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