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