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