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