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