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