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