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