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