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