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