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