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