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