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