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