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