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