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