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