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