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