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