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