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