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)(11,15)(12,13)(14,16)(17,18)(19,26)(20,24)(21,25)(22,30)(23,28)(27,31)(29,32) involution — undirected(2,6)(7,8)(9,10)(11,14)(12,13)(15,16)(17,19)(18,23)(20,27)(21,28)(22,31)(24,29)(25,26)(30,32) involution — undirected(1,3,5,4)(2,7,6,8)(10,13)(14,15)(17,18,24,30,21,25,22,20)(19,27,31,26,28,32,29,23)(9,11,12,16)(10,14,13,15)(17,20,24,18,21,30,22,25)(19,26,31,32,28,23,29,27)(1,4,5,3)(2,7,6,8)(18,25)(20,30)(23,26)(27,32)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.