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