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