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