One vertex per element, one color per generator, with an edge from x to x·s.
(2,6)(3,9)(4,11)(8,12)(10,13)(14,16)(17,18,24,29)(19,30,34,48)(20,26,23,38)(21,28,35,45)(22,27,36,46)(25,40,43,33)(31,42,39,47)(32,44,37,41)(1,2)(3,7)(4,12)(5,8)(6,11)(9,14)(10,15)(13,16)(17,19)(18,25)(20,31)(21,33)(22,37)(23,39)(24,34)(26,41)(27,30)(28,47)(29,43)(32,36)(35,40)(38,44)(42,45)(46,48) involution — undirected(1,3,5,10)(2,7,8,15)(4,13,11,9)(6,14,12,16)(17,20,24,23)(18,26,29,38)(19,31,34,39)(21,36,35,22)(25,41,43,44)(27,28,46,45)(30,47,48,42)(32,40,37,33)(2,8)(6,12)(7,15)(14,16)(17,21,23,36,24,35,20,22)(18,27,26,45,29,46,38,28)(19,32,31,33,34,37,39,40)(25,42,44,30,43,47,41,48)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.