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