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)(19,30)(20,26)(21,28)(22,37)(23,39)(24,29)(25,33)(27,36)(31,47)(32,44)(34,45)(35,46)(38,41)(40,42)(43,48) involution — undirected(1,2)(3,7)(4,12)(5,8)(6,11)(9,14)(10,15)(13,16)(17,19)(18,25)(20,31)(21,33)(22,38)(23,40)(24,34)(26,41)(27,45)(28,42)(29,43)(30,37)(32,36)(35,48)(39,44)(46,47) involution — undirected(1,3,5,10)(2,7,8,15)(4,13,11,9)(6,14,12,16)(17,20,24,23)(18,26,29,39)(19,31,34,40)(21,36,35,22)(25,41,43,44)(27,46,37,28)(30,42,45,47)(32,48,38,33)(2,8)(6,12)(7,15)(14,16)(17,21,23,36,24,35,20,22)(18,27,26,28,29,37,39,46)(19,32,31,33,34,38,40,48)(25,42,44,45,43,47,41,30)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.