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