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