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