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