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