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