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