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