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