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