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