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