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