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