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