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