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)(11,15)(12,16)(13,14)(17,18,23,27)(19,25,29,31)(20,30,28,24)(21,26,22,32)(2,6)(7,8)(10,14)(11,12)(17,19)(18,24)(20,22)(21,28)(23,29)(25,32)(26,31)(27,30) involution — undirected(1,3,5,4)(2,7,6,8)(9,11,13,12)(10,15,14,16)(17,20)(18,25)(19,21)(22,29)(23,28)(24,26)(27,31)(30,32)(1,4,5,3)(2,8,6,7)(11,12)(15,16)(17,18)(19,24)(20,31)(21,32)(22,26)(23,27)(25,28)(29,30)(9,12,13,11)(10,16,14,15)(17,21,23,22)(18,26,27,32)(19,28,29,20)(24,31,30,25)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.