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