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