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