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