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