One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(5,6,9,12)(7,10,14,18)(8,11,16,20)(13,17,15,19)(21,22,25,29)(23,31,32,27)(24,30,26,35)(28,34,36,33)(1,2,3,4)(5,7)(6,10)(8,15)(9,14)(11,19)(12,18)(13,16)(17,20)(21,23,25,32)(22,27,29,31)(24,34,26,33)(28,35,36,30)(5,8)(6,11)(7,13)(9,16)(10,17)(12,20)(14,15)(18,19)(21,23)(22,28)(24,33)(25,32)(26,34)(27,30)(29,36)(31,35) involution — undirected(8,16)(11,20)(13,15)(17,19)(22,29)(23,32)(30,35)(33,34) involution — undirected(7,14)(10,18)(13,15)(17,19)(21,24,25,26)(22,30,29,35)(23,33,32,34)(27,36,31,28)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.