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