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