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