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