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