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