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