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