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