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