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