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