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