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