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